Took forever, yet eventually found the place. Surprising lack of addresses for having stories in the Yorkshire Post and the BBC. Nobody actually linked to the address or a sale listing. Old Youth Hostel, Aysgarth, North Yorkshire. Corner of A684 and Church Bank. Shows up as the "Palmer Flatt Hotel, Leyburn DL8 3SR, UK" on Google Maps. Closest major city is Leeds at 1h 30m drive. Middlesbrough is maybe 1h 10m. Manchester is maybe 2h. Lots of very obvious books on every floor through the windows.
Notably, this is literally almost in the exact center of the Yorkshire Dales National Park. This about as far away from "anything" as you can even get in the United Kingdom.
https://www.google.com/maps/place/A684,+United+Kingdom/@54.2...
Echo the sentiment that 10 GBP/book, perpetual storage, sounds good, with the caveat that its in the middle of nowhere.